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Maxim > Products > [Interface and Interconnect] 
MAX218
1.8V to 4.25V Powered, True RS-232 Dual Transceiver


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 93kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX218 RS-232 transceiver is intended for battery-powered EIA/TIA-232E and V.28/V.24 communications interfaces that need two drivers and two receivers with minimum power consumption. It provides a wide +1.8V to +4.25V operating voltage range while maintaining true RS-232 and EIA/TIA-562 voltage levels. The MAX218 runs from two alkaline, NiCd, or NiMH cells without any form of voltage regulator.

A shutdown mode reduces current consumption to 1µA, extending battery life in portable systems. While shut down, all receivers can remain active or can be disabled under logic control, permitting a system incorporating the CMOS MAX218 to monitor external devices while in low-power shutdown mode.

A guaranteed 120kbps data rate provides compatibility with popular software for communicating with personal computers. Three-state drivers are provided on all receiver outputs so that multiple receivers, generally of different interface standards, can be wire-ORed at the UART. The MAX218 is available in 20-pin DIP, SO, and SSOP packages.

Key Features   Applications/Uses
BETTER THAN BIPOLAR!
  • Operates Directly from Two Alkaline, NiCd, or NiMH Cells
  • +1.8V to +4.25V Supply Voltage Range
  • 120kbps Data Rate
  • Low-Cost Surface-Mount Components
  • Meets EIA/TIA-232E Specifications
  • 1µA Low-Power Shutdown Mode
  • Both Receivers Active During Low-Power Shutdown
  • Three-State Receiver Outputs
  • Flow-Through Pinout
  • On-Board DC-DC Converters
  • 20-Pin SSOP, Wide SO, or DIP Packages

 
  		• Battery-Powered Applications
  		• Computers: Desktop, Workstation, Server
  		• Instruments
  		• Modems
  		• Peripherals
  		• Printers

    Key Specifications:  RS-232 Line Driver/Receivers
    Part Number VSUPPLY
    (V)    		 Tx Rx Data Rate
    (kbps)    		 ICC
    (mA)    		 Internal Charge Pump Ext. Caps Cap. Value
    (µF)    		 Rx Active in Shutdn Package/Pins Price
    min typ nom See Notes
    MAX218  1.8 2 2 120 1.9 Yes 2 0.33/0.68 2
    PDIP(N)/20
    SOIC(W)/20
    SSOP/20
    		 $1.92 @1k
    See All RS-232 Line Driver/Receivers (152)

    Diagram
    MAX218: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 654: New RS-232 ICs Feature 1µA Supply Current, ±15kV ESD Protection, and 3V Operation - MAX218
  		• Application Note 2141: Determining Clock Accuracy Requirements for UART Communications - MAX218

    Design Guides
  		• Interface (PDF)

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-19 of 19

    MAX218 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX218C/D    
    		Active DICE SALES;NA pin;0 mm²

    Land Pattern: Not Applicable
    Use pkgcode/variation: DICE*
    		See data sheet
    MAX218CPP+  
    		Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20+4*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218EPP+    
    		Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218CPP    
    		Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20-4*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218EPP    
    		Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218CWP+  
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218CWP+T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX218CWP    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218CWP-T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX218EWP    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218EWP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX218EAP+  
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218EAP+T    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218CAP    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218CAP-T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX218CAP+  
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218CAP+T    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218EAP    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218EAP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet

    Notes and Comments
  		• Operates directly from batteries without a voltage regulator

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    Document Ref.: 19-0246; Rev 1; 1995-07-01
    This page last modified: 2007-07-17


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